When I notice there’s quite a few of something interesting on the internet, I make a list of them and post it at mental_floss. Other people take a deeper interest in something fairly obscure that happens over and over, and they make a blog about it. Some subject wear themselves out pretty quickly -in fact, three blogs I jotted down for this list went completely defunct in the short time since. Others keep chugging along, waiting for anyone who is interested in that subject. Here are some more narrowly-focused blogs you might enjoy taking a look at, in a list I posted at mental_floss.